Effects of Blue of Glasses VS Standard Lenses on Contrast Sensitivity & Visual Fatigue in Myopic & Non-Myopic Adults

NCT06739525 | Active Not Recruiting DMC

• 1 other identifier: MSRSW/Batch-Fall22/749
• Study Type: interventional
• Target: 64
• Locations: 1 country
• Sites: 1

Brief Summary

This study investigates the effects of blue light-blocking glasses compared to standard lenses on contrast sensitivity and visual fatigue in myopic and non-myopic adults. With the growing use of digital screens, blue light exposure has raised concerns due to potential eye strain, sleep disruption, and visual fatigue.

Conditions

Myopia

Outcome Measures

Primary Outcomes (2)

• Contrast Sensitivity

  Measured using the Pelli-Robson chart to assess changes in visual acuity and sensitivity to contrast under different lens conditions.

  12 Months

• Visual Fatigue

  The Visual Fatigue Questionnaire (VFQ) was assessed to evaluate subjective experiences of eye strain and fatigue during visual tasks. Computer Vision Syndrome: Evaluated with the Computer Vision Syndrome Questionnaire (CVS-Q) to quantify symptoms associated with prolonged screen use, including dryness, discomfort, and eye strain."

  12 months

Study Arms (2)

interventional group

EXPERIMENTAL

Combination Product: Blue Light-Blocking Glasses (Intervention Group)

Control Group

ACTIVE COMPARATOR

Diagnostic Test: Standard Lenses (Control Group)

Interventions

Blue Light-Blocking Glasses (Intervention Group) COMBINATION_PRODUCT

Participants in this arm wore blue light-blocking glasses designed to filter out a portion of short-wavelength blue light. These lenses were intended to reduce eye strain and protect against blue light exposure, especially during prolonged screen time. Participants used blue light-blocking glasses consistently throughout the study period to assess their effect on contrast sensitivity and visual fatigue.

interventional group

Standard Lenses (Control Group) DIAGNOSTIC_TEST

Participants in this arm wore standard lenses without any blue light-blocking properties. These lenses allow the full spectrum of visible light to pass through and serve as a baseline control to measure against the blue light-blocking glasses. Participants used these lenses under the same conditions to assess contrast sensitivity and visual fatigue without blue light filtration.

Control Group

Eligibility Criteria

• Age: 18 Years - 50 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Adults aged 18-50 years.
• Both myopic (with any degree of myopia) and non-myopic adults.
• Participants who use computer screens for at least four hours per day.
• Individuals currently using corrective lenses or willing to wear study-provided glasses during the experiment.
• Individuals willing to complete the study protocol, which includes attending follow-up examinations and filling out visual fatigue questionnaires.

You may not qualify if:

• A history of any serious vision-related condition (such as glaucoma, cataracts, or retinal problems).
• Individuals who have already undergone refractive surgery (e.g., LASIK) or other types of eye surgery.
• Systemic conditions affecting vision include diabetes, neurological problems, and any other ailment that may impair visual ability.
• Taking drugs that are known to impair vision or produce visual tiredness (for example, certain antihistamines and antidepressants).
• Pregnant women's visual performance may be affected by hormonal changes.
• People with uncorrected vision difficulties cannot use the prescription lenses during study time.
• Participants who are allergic or sensitive to lens materials.

Sponsors & Collaborators

• Superior University: lead

Study Sites (1)

Tehsil Headquarters (THQ)

Taunsa, Punjab Province, Pakistan

Location

MeSH Terms

Conditions

Myopia

Condition Hierarchy (Ancestors)

Refractive Errors; Eye Diseases

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: HEALTH SERVICES RESEARCH
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: December 13, 2024
• First Posted: December 18, 2024
• Study Start: February 28, 2024
• Primary Completion: August 1, 2024
• Study Completion: January 31, 2025
• Last Updated: December 18, 2024

Record last verified: 2024-12

Data Sharing

• IPD Sharing: Will not share

Locations

PA (1)